let obj = {
  names: '张三',
  str: 'es6',
  age: '18'
}
console.log(obj.names);
console.log(Reflect.get(obj, "names"));

obj.names = '123';
console.log(obj.names);

Reflect.set(obj, 'names', '456');
console.log(Reflect.get(obj, "names"));

delete obj.str;
console.log(obj);

Reflect.deleteProperty(obj, 'age');
console.log(obj);